justice department sends in the fbi. there are two teams, a heavily armed tactical unit with armored personnel carriers, and negotiators, armed with a phone and their wits. >> i teach negotiators that the very first thing you have to have is self-control. >> reporter: gary nessner is the bureau's chief negotiator. when you got there, when you were briefed, what were you dealing with? >> i think in the context of the atf, where there clearly was anger, the freedom dominant emotion i was seeing or behavior was devastation. almost like walking zombies. >> reporter: nessner's team wants to understand koresh's personality. >> and this is something this whole nation's going to have to learn. whether they are going to learn by being sober and listening or whether they are going to learn the hard way. >> i believe everything he did, almost throughout the entirety of the ordeal, was ambivalence, was part of me wants to ve, part of me wants to die. >> reporter: they looked for clues in this tv news report about koresh and branch d